The Oregon Department of Environmental Quality (DEQ) implements the Hazardous Waste Management Program under ORS Chapter 466 and the corresponding administrative rules, primarily OAR Chapter 340, Division 100 through 172. These regulations establish the framework for identifying, managing, and disposing of hazardous waste within the state. A key aspect of this program is the generator’s responsibility to accurately classify their waste. When a generator in Oregon has a waste stream that exhibits characteristics of hazardous waste (ignitability, corrosivity, reactivity, or toxicity) or is listed as hazardous by the EPA or the state, they must manage it according to the applicable generator status. For a waste that is not a listed hazardous waste but exhibits one or more of the hazardous characteristics, the generator must conduct a hazardous waste determination. This determination is crucial for proper manifest preparation, accumulation, and transportation. If a waste exhibits the characteristic of toxicity as defined by the Toxicity Characteristic Leaching Procedure (TCLP) in OAR 340-100-0032, it is classified as hazardous waste. This classification triggers specific management requirements, including manifesting the waste for transport to a permitted treatment, storage, or disposal facility. Therefore, a waste that fails the TCLP for a specific constituent, such as lead, is definitively considered hazardous waste under Oregon law, irrespective of whether it is explicitly listed. The primary regulatory driver for this determination is the characteristic of toxicity as defined by the TCLP, which is a federal standard adopted and implemented by Oregon.

The Oregon Department of Environmental Quality (DEQ) regulates hazardous waste management under the Oregon Revised Statutes (ORS) Chapter 459 and associated administrative rules, primarily OAR Chapter 340, Division 100 through 150. A generator’s status as a small quantity generator (SQG) or a large quantity generator (LQG) is determined by the amount of hazardous waste they accumulate on-site during a calendar month. For SQGs, the limit is between 100 kilograms (kg) and 1,000 kg of hazardous waste, or not more than 1 kg of acutely hazardous waste, or not more than 100 kg of residue or contaminated debris from the treatment, storage, or disposal of acutely hazardous waste. LQGs accumulate 1,000 kg or more of hazardous waste, or more than 1 kg of acutely hazardous waste, or more than 100 kg of residue or contaminated debris from the treatment, storage, or disposal of acutely hazardous waste. An entirely new calendar month begins on the first day of the month. If a generator accumulates 950 kg of hazardous waste in the first week of January and an additional 150 kg in the second week of January, their total accumulation for January becomes 1100 kg. This total exceeds the 1000 kg threshold for SQGs, thus classifying them as an LQG for the entire month of January, and they must comply with LQG requirements from the moment they exceed the threshold. The key is the total amount accumulated within the calendar month, not the rate of accumulation or the amount generated per day. Therefore, upon generating the 1100 kg total in January, the facility transitions to LQG status for that month.

The Oregon Department of Environmental Quality (DEQ) establishes specific requirements for the management of hazardous waste, including manifest tracking and record-keeping. Under Oregon Administrative Rules (OAR) Chapter 340, Division 101, generators are responsible for ensuring that hazardous waste is properly managed from generation to final disposal. This includes using a manifest system to track shipments of hazardous waste. The manifest serves as a cradle-to-grave tracking document, documenting the quantity of waste, its classification, the generator, the transporter, and the designated treatment, storage, or disposal facility (TSDF). Generators are required to retain copies of the manifest for a specified period, typically three years from the date the waste was accepted by the initial transporter. This retention period is crucial for demonstrating compliance and for internal auditing purposes. If a generator receives a copy of the manifest from the designated TSDF indicating that the waste was received and managed, but does not receive the signed manifest back within 45 days of the initial shipment, they must take specific actions to investigate the discrepancy. These actions typically involve contacting the transporter and the designated TSDF to ascertain the status of the shipment. If the manifest cannot be retrieved or the discrepancy resolved within 60 days of the initial shipment, the generator must submit a report to the DEQ detailing the efforts made to recover the manifest and the status of the waste. This regulatory requirement underscores the importance of a robust tracking and record-keeping system for hazardous waste generators in Oregon to ensure accountability and environmental protection.

The Oregon Department of Environmental Quality (DEQ) requires specific procedures for managing hazardous waste. When a generator discovers that they have accumulated hazardous waste in quantities exceeding the limits for their generator status, they must immediately notify the DEQ. This notification is crucial for ensuring that the waste is managed in accordance with regulations, preventing potential environmental harm, and allowing the DEQ to track and oversee hazardous waste generation and management within the state. Failure to notify promptly can result in penalties. The regulations, particularly those derived from the Resource Conservation and Recovery Act (RCRA) and adopted by Oregon, outline these responsibilities for all hazardous waste generators, irrespective of their size or the specific type of hazardous waste. The emphasis is on proactive communication and compliance to maintain environmental safety standards.

The Oregon Department of Environmental Quality (DEQ) regulates hazardous waste management under the Oregon Hazardous Waste Management Act and associated administrative rules, primarily found in the Oregon Administrative Rules (OAR) Chapter 340, Divisions 100-144. Generators of hazardous waste are classified based on the quantity of hazardous waste they produce per calendar month. This classification determines the specific management standards they must follow. The categories are: Large Quantity Generators (LQGs), Small Quantity Generators (SQGs), and Very Small Quantity Generators (VSQGs). The threshold for a VSQG in Oregon is generating 100 kilograms (220 pounds) or less of hazardous waste per calendar month, or 1 kilogram (2.2 pounds) or less of acute hazardous waste per calendar month. An SQG generates more than 100 kilograms but less than 1,000 kilograms (2,200 pounds) of hazardous waste per calendar month, and does not exceed the acute hazardous waste limits for a VSQG. An LQG generates 1,000 kilograms or more of hazardous waste per calendar month, or more than 1 kilogram of acute hazardous waste per calendar month. The scenario describes a facility in Oregon that consistently produces 150 kilograms of hazardous waste per month, and on one occasion, 1.5 kilograms of a specific hazardous waste identified as acutely hazardous. Since the monthly generation of non-acute hazardous waste (150 kg) exceeds the VSQG threshold (100 kg) and falls below the LQG threshold (1,000 kg), and the generation of acute hazardous waste (1.5 kg) exceeds the VSQG threshold for acute hazardous waste (1 kg), the facility’s generator status is determined by the higher of these two classifications. In this case, exceeding the acute hazardous waste threshold places the facility into the Small Quantity Generator category for that month, as it is greater than the VSQG acute threshold but less than the LQG acute threshold. Therefore, the facility must comply with the management standards applicable to SQGs.

The Oregon Department of Environmental Quality (DEQ) mandates specific requirements for the management of hazardous waste. When a generator of hazardous waste discovers that they have significantly exceeded their generator category limits, they are required to reclassify themselves and comply with the requirements of the new, higher generator category. This reclassification must occur immediately upon the discovery of the exceedance. The generator is then subject to the manifest, storage, and reporting requirements associated with the new category. For instance, if a small quantity generator (SQG) in Oregon exceeds the 1,000 kg per month limit for hazardous waste accumulation, they must immediately comply with the regulations for a large quantity generator (LQG). This includes adhering to LQG accumulation time limits (90 days) and storage unit requirements, as well as obtaining an EPA identification number if they did not already have one. The regulations are designed to ensure that hazardous waste is managed safely and in accordance with its potential risks, irrespective of whether the exceedance was intentional or accidental. Prompt and accurate self-identification and reclassification are fundamental to compliance.

The scenario describes a situation where a generator in Oregon is managing hazardous waste that is not listed as a specific hazardous waste under the Oregon Administrative Rules (OAR) chapter 340, division 101, but exhibits characteristics of hazardous waste, specifically ignitability. Under Oregon’s hazardous waste regulations, which are largely aligned with federal Resource Conservation and Recovery Act (RCRA) requirements, a waste is classified as hazardous if it is either listed or exhibits a characteristic of hazardous waste. The characteristics include ignitability, corrosivity, reactivity, and toxicity. Since the waste is described as ignitable, it meets the definition of a characteristic hazardous waste regardless of whether it is specifically listed. Generators are responsible for determining if their waste is hazardous. This determination can be made through knowledge of the process generating the waste or through laboratory testing. Once determined to be hazardous, the waste must be managed according to the applicable generator status requirements in OAR 340, division 102, which dictate accumulation time limits, container management, labeling, and manifest requirements for shipment to a permitted treatment, storage, and disposal facility. Therefore, the generator must comply with the regulations for hazardous waste management, including proper identification, storage, and manifesting, as if it were a listed hazardous waste.

The Oregon Department of Environmental Quality (DEQ) categorizes hazardous waste generators based on the amount of hazardous waste they produce per month. This classification determines the specific management standards and regulatory requirements that apply to the facility. The three main categories are: Very Small Quantity Generator (VSQG), Small Quantity Generator (SQG), and Large Quantity Generator (LQG). A VSQG generates 100 kilograms (kg) or less of hazardous waste per month, or 1 kilogram (kg) or less of acute hazardous waste per month, or never accumulates more than 1,000 kg of hazardous waste at any time. An SQG generates between 100 kg and 1,000 kg of hazardous waste per month. An LQG generates 1,000 kg or more of hazardous waste per month, or 1 kg or more of acute hazardous waste per month. The scenario describes a facility in Oregon that consistently generates 950 kg of hazardous waste per month and on one occasion, due to an unexpected surge in production, generated 1,200 kg of hazardous waste in a single month. The critical factor in determining generator status is the *monthly* generation rate. While the facility typically falls into the SQG category with 950 kg per month, the regulation mandates that if a generator exceeds the SQG threshold in any single month, they are subject to LQG requirements for that month and potentially subsequent months, depending on their return to below the LQG threshold. The temporary exceedance to 1,200 kg in one month triggers LQG status for that specific period. Therefore, the facility’s status for that particular month is Large Quantity Generator.

The Oregon Department of Environmental Quality (DEQ) employs a tiered approach to hazardous waste management, aligning with federal Resource Conservation and Recovery Act (RCRA) regulations but with state-specific nuances. A critical aspect of this is the generator status, which dictates the regulatory requirements a facility must adhere to. The determination of a facility’s generator status is primarily based on the quantity of hazardous waste generated per calendar month. For small quantity generators (SQGs), this threshold is between 100 and 1,000 kilograms (approximately 220 to 2,200 pounds) of hazardous waste. Large quantity generators (LQGs) generate 1,000 kilograms or more per month. Conditionally exempt small quantity generators (CESQGs), now often referred to as very small quantity generators (VSQGs) under federal revisions and similarly in Oregon, generate 100 kilograms or less per month. The question asks about the specific threshold that distinguishes a small quantity generator from a very small quantity generator in Oregon. This distinction is crucial for compliance, as SQGs face more stringent requirements than VSQGs, including limitations on accumulation time and quantities, manifest requirements for off-site shipment, and specific personnel training. The regulatory framework in Oregon, as outlined in the Oregon Administrative Rules (OAR) Chapter 340, Division 150, defines these categories. Therefore, the upper limit for a very small quantity generator, and consequently the lower limit for a small quantity generator, is 100 kilograms of hazardous waste per calendar month.

Oregon Administrative Rule (OAR) 340-261-0050 outlines the requirements for hazardous waste generator status. This rule categorizes generators based on the quantity of hazardous waste produced per month. A very small quantity generator (VSQG) produces 100 kilograms or less of hazardous waste per month, or 1 kilogram or less of acute hazardous waste per month. A small quantity generator (SQG) produces more than 100 kilograms but less than 1,000 kilograms of hazardous waste per month. A large quantity generator (LQG) produces 1,000 kilograms or more of hazardous waste per month. The question presents a scenario where a facility in Oregon generates 150 kilograms of hazardous waste and 0.5 kilograms of acute hazardous waste in a calendar month. To determine the generator status, we must consider both waste streams independently and then apply the most stringent category if applicable. The 150 kilograms of hazardous waste places the facility in the SQG category. The 0.5 kilograms of acute hazardous waste is less than the 1 kilogram threshold for VSQG status for acute hazardous waste, meaning it does not independently qualify the facility as a VSQG based on acute hazardous waste alone. However, the primary determination for generator status is based on the total quantity of hazardous waste. Since 150 kg of hazardous waste exceeds the VSQG threshold (100 kg) but is less than the SQG threshold (1,000 kg), the facility is classified as a small quantity generator. The presence of acute hazardous waste below the VSQG threshold for that specific category does not alter the classification derived from the general hazardous waste quantity. Therefore, the facility is a small quantity generator.

The Oregon Department of Environmental Quality (DEQ) implements the Hazardous Waste Management Act, which is largely aligned with the federal Resource Conservation and Recovery Act (RCRA). A key aspect of this act is the management of hazardous waste from its generation to its final disposal, often referred to as “cradle-to-grave” management. This includes requirements for generators, transporters, and treatment, storage, and disposal facilities (TSDFs). Specifically, the definition of a hazardous waste generator is crucial for determining applicable regulatory requirements. A generator is classified based on the quantity of hazardous waste produced per month. Small Quantity Generators (SQGs) are subject to less stringent requirements than Large Quantity Generators (LQGs). In Oregon, an SQG is defined as a generator who produces between 100 and 1,000 kilograms of hazardous waste per month, or less than 1 kilogram of acute hazardous waste per month. An LQG is defined as a generator who produces 1,000 kilograms or more of hazardous waste per month, or more than 1 kilogram of acute hazardous waste per month. Conditionally Exempt Small Quantity Generators (CESQGs), now often referred to as Very Small Quantity Generators (VSQGs) under federal revisions, are those generating 100 kilograms or less of hazardous waste per month, or less than 1 kilogram of acute hazardous waste per month. These distinctions are fundamental for compliance, as they dictate storage limits, personnel training, contingency planning, and reporting obligations. The scenario presented involves a facility that generates 950 kilograms of hazardous waste per month, which falls squarely within the SQG threshold. Therefore, the facility must comply with the regulations applicable to SQGs in Oregon.

The Oregon Department of Environmental Quality (DEQ) regulates hazardous waste management under the Oregon Revised Statutes (ORS) Chapter 459 and its corresponding administrative rules, primarily Oregon Administrative Rules (OAR) Chapter 340, Divisions 100 through 180. Specifically, the definition of hazardous waste is critical for determining regulatory applicability. ORS 459.410(13) defines hazardous waste, and OAR 340-100-0020 provides the specific criteria and lists. A waste is considered hazardous if it exhibits a characteristic of hazardous waste (ignitability, corrosivity, reactivity, or toxicity) or if it is listed by the EPA or the state as hazardous. The toxicity characteristic is determined by the Toxicity Characteristic Leaching Procedure (TCLP), as outlined in OAR 340-100-0120, which references federal EPA methods. If a waste leaches specific contaminants above regulatory thresholds, it is classified as hazardous. In this scenario, the waste exhibits corrosivity due to its low pH, a characteristic defined in OAR 340-100-0100(1)(a). The pH of the waste is measured at 1.5, which is below the threshold of 2.0 for corrosivity, making it a hazardous waste regardless of whether it is listed or exhibits other characteristics. Therefore, the generator must comply with all applicable hazardous waste regulations in Oregon.

The Oregon Department of Environmental Quality (DEQ) has specific requirements for the management of hazardous waste. When a generator of hazardous waste in Oregon ceases to operate, they must ensure that all hazardous waste management activities are properly concluded. This involves a comprehensive closure process for any permitted or registered hazardous waste treatment, storage, or disposal facilities (TSDFs) or for any on-site accumulation areas that were managed under specific generator requirements. The core principle is that the generator remains responsible for the hazardous waste from its generation until its final disposition, even after ceasing operations. Therefore, a generator that has ceased operations must still comply with all applicable regulations regarding the proper management and disposal of any remaining hazardous waste. This includes ensuring that all waste is characterized, manifested, transported by a licensed hazardous waste transporter, and sent to a permitted treatment, storage, or disposal facility. The generator’s closure plan, if applicable, would detail these steps. The responsibility for ensuring proper disposal does not disappear simply because the business has closed. The regulations are designed to prevent abandoned hazardous waste from causing environmental harm. This means that even without active operations, the legal obligations persist for any hazardous waste that was generated or managed at the site.

The Oregon Hazardous Waste Program, administered by the Oregon Department of Environmental Quality (DEQ), establishes stringent requirements for the management of hazardous waste. A key aspect of this program is the generator status, which dictates the specific regulatory obligations a facility must adhere to based on the quantity of hazardous waste it produces monthly. The regulations distinguish between Very Small Quantity Generators (VSQGs), Small Quantity Generators (SQGs), and Large Quantity Generators (LQGs). VSQGs are subject to the least stringent requirements, while LQGs face the most comprehensive set of rules. These regulations are designed to protect human health and the environment by ensuring that hazardous waste is properly identified, stored, transported, treated, and disposed of. Understanding these distinctions is crucial for any entity generating hazardous waste in Oregon, as non-compliance can lead to significant penalties. The classification is based on the amount of hazardous waste generated per month, and also considers the accumulation of acutely hazardous waste, which has even stricter limits. The regulations are detailed and require careful review of waste streams and generation rates to ensure proper compliance.

Oregon Administrative Rule (OAR) 340-261-0030 outlines the requirements for hazardous waste generator status. This rule categorizes generators based on the quantity of hazardous waste produced per month. A very small quantity generator (VSQG) generates 100 kilograms or less of hazardous waste per month, or 1 kilogram or less of acutely hazardous waste per month. A small quantity generator (SQG) generates between 100 and 1,000 kilograms of hazardous waste per month. A large quantity generator (LQG) generates 1,000 kilograms or more of hazardous waste per month. The question presents a scenario where a facility in Oregon consistently generates 150 kilograms of hazardous waste per month, with no acutely hazardous waste. Based on the thresholds defined in OAR 340-261-0030, this facility’s monthly generation of 150 kilograms of hazardous waste places it squarely within the Small Quantity Generator (SQG) category, as this amount exceeds the VSQG limit of 100 kilograms but does not reach the LQG threshold of 1,000 kilograms. Therefore, the facility must comply with the regulations applicable to SQGs in Oregon, which differ from those for VSQGs and LQGs in terms of storage limits, personnel training, contingency planning, and reporting.

Oregon Administrative Rule (OAR) 340-261-0040 outlines the requirements for hazardous waste generator status. A facility that generates more than 1,000 kilograms of hazardous waste in any single month, or more than 1 kilogram of acute hazardous waste in any single month, is classified as a Large Quantity Generator (LQG). The classification is based on the maximum amount of hazardous waste generated in any calendar month. If a facility’s generation rate fluctuates, its status is determined by the highest generation rate achieved in any month. Therefore, if a facility generates 1,100 kg of hazardous waste in March and 900 kg in April, it is considered an LQG for both months because its peak generation exceeded the 1,000 kg threshold in March. Similarly, if it generates 0.5 kg of acute hazardous waste in January and 1.2 kg in February, it is an LQG in February. The question asks for the generator status in April, given that the facility was an LQG in March. This implies that in March, the generation rate exceeded the LQG threshold. The information provided states that in April, the facility generated 850 kg of hazardous waste. Since 850 kg is less than 1,000 kg, and the question does not mention any acute hazardous waste generation in April, the facility’s status in April would revert to a status below LQG, assuming no other factors or prior LQG status in April itself. However, the question states the facility *was* an LQG in March, meaning it met the criteria for LQG status in that month. The critical piece of information is the April generation rate of 850 kg. To be an LQG, a facility must generate over 1,000 kg of hazardous waste or over 1 kg of acute hazardous waste in a calendar month. Since 850 kg is less than 1,000 kg, and no acute hazardous waste is mentioned for April, the facility is not an LQG in April. The prompt states the facility was an LQG in March, implying a previous month’s generation rate met the LQG criteria. The April generation rate of 850 kg does not meet the LQG threshold. Therefore, the facility is not an LQG in April.

The Oregon Department of Environmental Quality (DEQ) implements the Hazardous Waste Management Program, which is largely based on the federal Resource Conservation and Recovery Act (RCRA). For generators of hazardous waste, a key aspect is determining if their waste is regulated. This involves a two-step process: first, identifying if the waste exhibits any hazardous characteristics (ignitability, corrosivity, reactivity, or toxicity) or if it is a listed hazardous waste. If the waste is not hazardous, it is considered solid waste. If it is hazardous, then the generator must comply with specific management standards based on their generator status, which is determined by the quantity of hazardous waste produced per month. Oregon Administrative Rule (OAR) 340-210-0030 outlines these generator categories. A very small quantity generator (VSQG) generates 100 kilograms or less of hazardous waste per month, or 1 kilogram or less of acute hazardous waste. A small quantity generator (SQG) generates more than 100 kilograms but less than 1,000 kilograms of hazardous waste per month. A large quantity generator (LQG) generates 1,000 kilograms or more of hazardous waste per month. The scenario describes a facility that generates 80 kilograms of waste identified as exhibiting the characteristic of ignitability and 20 kilograms of waste identified as exhibiting the characteristic of toxicity, for a total of 100 kilograms of hazardous waste in a calendar month. Since the total monthly generation of hazardous waste is 100 kilograms, and this does not exceed the threshold for a small quantity generator, the facility falls into the very small quantity generator category.

The Oregon Department of Environmental Quality (DEQ) implements the Hazardous Waste Management Program, which is largely based on the federal Resource Conservation and Recovery Act (RCRA). ORS Chapter 459 and its associated administrative rules (Oregon Administrative Rules – OAR Chapter 340, Divisions 100-170) govern hazardous waste management in Oregon. A key aspect of this program is the management of hazardous waste by generators. Generators are categorized based on the quantity of hazardous waste they produce per month. These categories, such as very small quantity generators (VSQGs), small quantity generators (SQGs), and large quantity generators (LQGs), dictate specific management requirements, including storage time limits, manifest requirements, personnel training, and contingency planning. The distinction between these generator categories is crucial for compliance. For instance, LQGs face the most stringent requirements, including stricter storage limits and personnel training mandates, reflecting the higher potential risk associated with larger volumes of hazardous waste. VSQGs, on the other hand, have the least stringent requirements, often allowing for accumulation of waste for longer periods under specific conditions, but still requiring proper disposal. The classification of a generator is determined by the total amount of hazardous waste generated in a calendar month, not just a single waste stream. This includes all hazardous wastes, regardless of their specific characteristics or EPA hazardous waste codes. Understanding these distinctions is fundamental for any entity generating hazardous waste in Oregon to ensure regulatory compliance and protect human health and the environment.

The Oregon Department of Environmental Quality (DEQ) has specific regulations regarding the management of hazardous waste, particularly concerning the accumulation of waste on-site by small quantity generators (SQGs). Oregon Administrative Rule (OAR) 340-261-0106 outlines the conditions under which an SQG can accumulate hazardous waste on-site without a permit. For SQGs, the primary time limit for accumulation is 180 days. However, if the hazardous waste must be transported over 200 miles to reach a treatment, storage, or disposal facility (TSDF), this period can be extended to 270 days. This extension is explicitly detailed in the regulations to accommodate logistical challenges faced by generators in remote areas or those dealing with specialized disposal needs. The key is that the generator must be able to demonstrate that the longer accumulation period is necessary due to the distance to the designated TSDF and that they are making reasonable efforts to dispose of the waste. The other options represent incorrect timeframes or conditions that do not align with the specific provisions for SQGs under Oregon’s hazardous waste regulations. For instance, 90 days is typically associated with large quantity generators, and 365 days is generally not permitted for on-site accumulation by SQGs without a permit.

The Oregon Department of Environmental Quality (DEQ) has specific requirements for the management of hazardous waste, including the classification of materials. When a generator produces a waste stream, they must determine if it meets the definition of hazardous waste under Oregon Administrative Rules (OAR) Chapter 340, Division 100. This involves evaluating the waste against listed hazardous wastes and characteristic hazardous wastes. Characteristic hazardous wastes are those that exhibit ignitability, corrosivity, reactivity, or toxicity. The toxicity characteristic is determined by the Toxicity Characteristic Leaching Procedure (TCLP), as outlined in OAR 340-100-0032. If a waste, when subjected to the TCLP, leaches certain constituents above specified regulatory levels, it is classified as a toxic hazardous waste. For example, if a waste sample, after undergoing the TCLP, yields a leachate concentration of lead exceeding 5.0 mg/L, it would be classified as a D008 hazardous waste due to toxicity. The generator bears the responsibility for making this determination through testing or knowledge of the process generating the waste. This classification dictates the subsequent management requirements, including storage, transportation, and disposal. Failure to properly classify hazardous waste can result in significant penalties and environmental harm.

The Oregon Department of Environmental Quality (DEQ) implements the Hazardous Waste Management Program, which is largely based on the federal Resource Conservation and Recovery Act (RCRA). Generators of hazardous waste are classified based on the quantity of hazardous waste they produce per month. These classifications, known as generator categories, determine the specific management standards that apply. The categories are: Very Small Quantity Generators (VSQGs), Small Quantity Generators (SQGs), and Large Quantity Generators (LQGs). A VSQG is defined as a generator who produces 100 kilograms or less of hazardous waste per month, or 1 kilogram or less of acute hazardous waste per month, or less than or equal to 1 kilogram of acutely toxic waste per month. An SQG is a generator who produces more than 100 kilograms but less than 1,000 kilograms of hazardous waste per month. An LQG is a generator who produces 1,000 kilograms or more of hazardous waste per month. The question asks about a facility that consistently generates 80 kilograms of hazardous waste monthly and 0.5 kilograms of acute hazardous waste monthly. This combination places the facility squarely within the Very Small Quantity Generator category, as it meets the criteria for both hazardous waste quantity and acute hazardous waste quantity. The specific regulatory requirements for VSQGs in Oregon, mirroring federal RCRA, are less stringent than for SQGs or LQGs, focusing on basic record-keeping, proper accumulation, and disposal at permitted facilities.

The Oregon Department of Environmental Quality (DEQ) has specific requirements for the management of hazardous waste. When a generator of hazardous waste ceases to operate, they must ensure that all hazardous waste is managed appropriately. This includes either shipping the waste to a permitted treatment, storage, and disposal facility (TSDF) or making arrangements for its proper closure and management. The regulations, particularly those found within the Oregon Administrative Rules (OAR) Chapter 340, Division 24, govern these activities. Specifically, OAR 340-240-0030 addresses closure of hazardous waste management units. If a facility is closing and has hazardous waste on-site that cannot be shipped off-site due to a lack of a permitted facility or other logistical issues, the generator must still demonstrate that the waste is managed in accordance with DEQ requirements. This typically involves a detailed closure plan that includes provisions for the proper storage and eventual management of any remaining hazardous waste, often requiring the waste to be placed in a secure, compliant storage area until it can be transported. The concept of “post-closure care” applies to permitted TSDFs, but for a generator ceasing operations, the focus is on ensuring the waste is either removed or managed in a way that prevents environmental harm during the closure period and any subsequent period until it is fully managed. The key is that the generator retains responsibility for the waste until it is properly managed at a permitted facility or through an approved closure process. Simply abandoning the waste or placing it in an unpermitted area would constitute a violation. Therefore, the generator must make demonstrable arrangements for the waste’s proper management, which implies either transport or secure on-site management pending transport.

The Oregon Department of Environmental Quality (DEQ) oversees hazardous waste management under the Oregon Revised Statutes (ORS) Chapter 459 and its corresponding administrative rules, particularly Oregon Administrative Rules (OAR) Chapter 340, Division 211. This division details the requirements for hazardous waste generators, including manifesting, record-keeping, and contingency planning. A key aspect of generator compliance is understanding the criteria for managing hazardous waste, especially when it becomes a “discarded material.” For a material to be regulated as hazardous waste in Oregon, it must meet the definition of hazardous waste as outlined in OAR 340-211-0014. This definition includes materials that are listed by the U.S. Environmental Protection Agency (EPA) or exhibit hazardous characteristics such as ignitability, corrosivity, reactivity, or toxicity. The scenario describes a laboratory that has identified a waste solvent. The critical element is whether this solvent, when discarded, meets the criteria for hazardous waste under Oregon law. If the solvent exhibits a hazardous characteristic, such as a flash point below 60 degrees Celsius (140 degrees Fahrenheit), it would be classified as ignitable hazardous waste. Alternatively, if it is listed as a hazardous waste by the EPA or the state, it would also be regulated. The question probes the understanding of when a waste material transitions from a usable product or byproduct to a regulated hazardous waste. The trigger for regulation is the act of discarding the material and its subsequent classification as hazardous, not its mere presence or potential use. Therefore, the crucial point is the generator’s determination of whether the discarded solvent meets any of the established hazardous waste criteria under Oregon Administrative Rules. The mere fact that it is a solvent does not automatically make it hazardous waste; it must be determined to be so based on its properties or listing.

The Oregon Department of Environmental Quality (DEQ) regulates hazardous waste management under the Oregon Revised Statutes (ORS) Chapter 459 and the Oregon Administrative Rules (OAR) Chapter 340, Division 100. A key aspect of this regulation involves the management of hazardous waste generators. Generators are classified based on the amount of hazardous waste they produce per month. This classification determines the specific requirements they must adhere to, including storage limits, manifest requirements, and reporting obligations. The classification system is designed to match the regulatory burden with the potential risk posed by the generator’s activities. Small quantity generators (SQGs) have less stringent requirements than large quantity generators (LQGs). The threshold for SQG status in Oregon is typically between 100 and 1,000 kilograms of hazardous waste per month, and less than 1 kilogram of acutely hazardous waste per month. Conditionally exempt small quantity generators (CESQGs) produce even less hazardous waste, generally less than 100 kilograms per month, and have significantly reduced regulatory obligations. The question asks about a facility that generates 800 kilograms of hazardous waste per month, but no acutely hazardous waste. This quantity falls within the range for a small quantity generator. Therefore, the facility would be classified as a small quantity generator and must comply with the specific requirements for that category, which are more rigorous than those for CESQGs but less so than for LQGs. This classification dictates aspects like the maximum accumulation time for hazardous waste on-site before it must be shipped off-site by a licensed transporter using a hazardous waste manifest.

The question concerns the management of hazardous waste generated by a small quantity generator (SQG) in Oregon. Under Oregon Administrative Rules (OAR) Chapter 340, Division 101, an SQG is defined as a generator who produces between 100 and 1,000 kilograms (approximately 220 to 2,200 pounds) of hazardous waste per month, or less than 1 kilogram of acutely hazardous waste per month. SQGs have specific requirements for accumulation, labeling, and manifest use. They are allowed to accumulate hazardous waste on-site for up to 180 days without a permit, provided they meet certain conditions. These conditions include marking containers with the words “Hazardous Waste,” the accumulation start date, and the manifest number. If the waste is shipped to a facility located more than 200 miles away, the accumulation time limit can be extended to 270 days. The critical element here is the manifest requirement for off-site shipment. Oregon, like other states, utilizes the Uniform Hazardous Waste Manifest system to track hazardous waste from its point of generation to its final disposal. This manifest is a legal document that accompanies hazardous waste shipments. For SQGs, the manifest is required when shipping hazardous waste off-site to a treatment, storage, or disposal facility (TSDF). The manifest serves as proof that the waste was properly managed and disposed of. Therefore, a generator must use a manifest when shipping hazardous waste off-site.

The Oregon Department of Environmental Quality (DEQ) regulates hazardous waste management under the Oregon Hazardous Waste Management Act, primarily implemented through the Oregon Administrative Rules (OAR) Chapter 340, Division 100. This division outlines the requirements for hazardous waste generators, transporters, and treatment, storage, and disposal facilities (TSDFs). A key aspect of generator requirements is the proper classification of waste. Waste is considered hazardous if it exhibits a characteristic of hazardous waste (ignitability, corrosivity, reactivity, or toxicity) or if it is listed as hazardous by the EPA or the state of Oregon. For toxicity, the Toxicity Characteristic Leaching Procedure (TCLP) is used to determine if a waste is hazardous due to the presence of certain contaminants at concentrations exceeding regulatory limits. If a waste is determined to be hazardous, the generator must comply with specific management standards, including obtaining an EPA identification number, manifesting the waste for off-site shipment, and adhering to accumulation time limits. Oregon’s regulations often align with federal Resource Conservation and Recovery Act (RCRA) requirements but may include stricter or additional provisions. For example, the state may have specific requirements for certain waste streams or activities not explicitly detailed in federal regulations. Understanding the interplay between federal RCRA and Oregon’s specific rules is crucial for compliance.

The scenario describes a situation where a generator in Oregon has accumulated hazardous waste exceeding the 90-day limit for a large quantity generator (LQG). Specifically, the generator has 150 days of waste on-site. Under Oregon Administrative Rule (OAR) 340-261-0106(1)(a), a large quantity generator is permitted to accumulate hazardous waste on-site for 90 days or less. When this limit is exceeded, the generator is considered to be operating a hazardous waste treatment, storage, or disposal facility (TSDF) and must obtain a facility operating permit from the Oregon Department of Environmental Quality (DEQ). The question asks about the regulatory status of the generator after exceeding the 90-day accumulation period. The correct regulatory status is that the generator must obtain a TSDF operating permit. This is a fundamental requirement for any entity that stores hazardous waste beyond the allowed accumulation timeframes without a permit. The concept of exceeding accumulation limits triggering TSDF requirements is a core principle in hazardous waste management under both federal and Oregon state regulations, emphasizing the need for strict control over hazardous waste storage.

The Oregon Department of Environmental Quality (DEQ) regulates hazardous waste management under the Oregon Revised Statutes (ORS) Chapter 459 and associated administrative rules, primarily Oregon Administrative Rules (OAR) Chapter 340, Division 100 through 152. Generators of hazardous waste are classified based on the quantity of hazardous waste they produce per month. This classification determines the specific regulatory requirements they must follow, including storage limits, record-keeping, contingency planning, and personnel training. The categories are typically Very Small Quantity Generators (VSQGs), Small Quantity Generators (SQGs), and Large Quantity Generators (LQGs). A facility that generates more than 1,000 kilograms (kg) of hazardous waste in any single month is classified as a Large Quantity Generator. This classification triggers the most stringent set of federal and state requirements, including specific time limits for on-site accumulation, the need for a hazardous waste permit or interim status, and detailed manifest requirements for off-site transportation. The question asks about a facility that accumulates 1,500 kg of hazardous waste at the end of a calendar month. This quantity exceeds the 1,000 kg threshold for Large Quantity Generator status. Therefore, the facility must comply with the regulations applicable to LQGs, which include obtaining an EPA identification number and adhering to the most rigorous management standards.

The Oregon Department of Environmental Quality (DEQ) has specific regulations concerning the management of hazardous waste. A key aspect of these regulations involves the classification and handling of materials that may exhibit hazardous characteristics. When a facility generates a waste stream, it is the generator’s responsibility to determine if that waste is hazardous. This determination process involves consulting the Oregon Administrative Rules (OAR), specifically those pertaining to hazardous waste identification. If a waste is not listed as hazardous and does not exhibit any of the four hazardous characteristics (ignitability, corrosivity, reactivity, or toxicity), it is generally considered non-hazardous. However, if the waste exhibits any of these characteristics, it must be managed as hazardous waste according to the applicable rules, which include requirements for storage, labeling, manifesting, and disposal. The toxicity characteristic, in particular, is assessed through specific testing protocols outlined in the regulations. The scenario describes a waste that, through testing, shows a pH of 2.5. According to OAR 340-261-0213, a liquid waste exhibits the characteristic of corrosivity if it has a pH less than or equal to 2.0 or greater than or equal to 12.5. Since the tested pH of 2.5 falls between 2.0 and 12.5, the waste does not exhibit the characteristic of corrosivity based on pH alone. Therefore, the waste is not classified as hazardous due to corrosivity based on this specific parameter. The question asks about the classification of this waste.

The Oregon Department of Environmental Quality (DEQ) establishes specific requirements for the management of hazardous waste, including those generated by small quantity generators (SQGs). Under Oregon Administrative Rules (OAR) Chapter 340, Division 150, an SQG is defined as a generator who produces between 100 and 1,000 kilograms of hazardous waste per month. A key distinction for SQGs compared to large quantity generators (LQGs) is the accumulation time limits for hazardous waste on-site. While LQGs must ship their waste within 90 days, SQGs have a longer period. Specifically, SQGs in Oregon can accumulate hazardous waste on-site for up to 180 days without a storage permit, provided they meet certain conditions. These conditions include adhering to accumulation quantity limits and ensuring proper management of the waste. If an SQG needs to accumulate waste for more than 180 days, they must obtain a storage permit or meet the requirements for a large quantity generator. Therefore, the maximum period an SQG can accumulate hazardous waste on-site without a permit in Oregon is 180 days. This provision allows flexibility for smaller generators to manage their waste streams effectively while still ensuring environmental protection. Understanding these time limits is crucial for compliance with Oregon’s hazardous waste regulations.